.Index{
    width: 100%;
    height: 100%;
}
.header{
    width: 100%;
    position: fixed;
    z-index: 99;
}

.body{
    width: 100%;
    height: 100%;
    margin-top: 11vw;
    position: absolute;
    z-index: 1;
}
.banner{
    width: 100%;
}

.nav_line{
    width: 100%;
}

.announcement_info{
    width: 100%;
}
.policy_declare{
    width: 100%;
}
